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PDF M56755FP Data sheet ( Hoja de datos )
| Número de pieza | M56755FP | |
| Descripción | SPINDLE MOTOR DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M56755FP (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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MITSUBISHI <CONTROL / DRIVER IC>
M56755FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56755FP is a semiconductor integrated circuit designed for a
single chip controller for CD-ROM spindle motor.
M56755FP has a both (forward and reverse) motor torque control
by the motor speed control terminal.
M56755FP has the several braking mode that an user can flexibly
select in order to generate the reverse torque. Also, this device
includes a bias circuit for Hall Sensor, a current limit circuit and a
thermal shut down function.
FEATURES
qThe supply voltage with wide range.
(4.5V to 13.2V)
qHigh motor drive current (1.2A)
qMotor current control for the both motor torque is possible.
qReverse torque mode select (SHORT BRAKING, etc)
qSleep mode
qHall amplifier sensitivity select
qAutomatic stop select (with reverse detected signal pin)
APPLICATION
CD-ROM, DVD, DVD-ROM etc.
PIN CONFIGURATION (TOP VIEW)
S/S 1
RDS 2
FG 3
CI 4
MODE2 5
MODE1 6
7
8
GND
9
10
11
12
VM 13
VCC2 14
EC 15
ECR 16
VCC1 17
HB 18
36 W
35 V
34 U
33 RS
32 MODE3
31 MODE4
30
29
28
GND
27
26
25
24 Hw-
23 Hw+
22 Hv-
21 Hv+
20 Hu-
19 Hu+
Outline 36P2R-D
BLOCK DIAGRAM
U VW
34 35 36
S/S
1
RS VCC1
33 17
VM 13
VCC2 14
MODE1 6
MODE2 5
MODE4 31
MODE3 32
FG 3
RDS 2
BRAKING
MODE
CHANGE
SENSE
120˚
MATRIX
I/I
converter
TSD
FG
RDS
+-
+-
+-
Hall bias
19 20
Hu+ Hu-
21 22
Hv+ Hv-
23 24
Hw+ Hw-
18
HB
4
CI
7
8
Vref 9
GND
10
11
12
V/I converter
15 16
EC ECR
25
26
27
GND
28
29
30
1 page  
MITSUBISHI <CONTROL / DRIVER IC>
M56755FP
SPINDLE MOTOR DRIVER
HALL AMPLIFIER INPUT AND COMMUTATION
The relationship between the hall amplifier inputs voltage and the motor current outputs is as shown in Figure 2.
Hall
inputs
Output
current
Figure 2.
Hw+ Hv+
Hu+
V U WV
UW
V
U
Hall elements
V
U
W
SOURSE
U
V
W
U
W
V
U
W
V
Outer loator
REVERSE
EC>ECR
SINK
W
FORWARD
EC<ECR
HALL AMPLIFIER INPUT SENSITIVITY SELECT
MODE4
OPEN or HIGH
GND
120 degree
soft switching
120 degree switching
** Io current
will be shape.
The hall amp
input voltage
minimum is
50mVp-p.
Figure 3.
The hall amp
input voltage
minimum is
35mVp-p.
Figure 3 shows the hall amplifier input sensitivity select
function. An user is able to select the sensitivity of a hall
amplifier to match with the hall elements type.
If the output minimum level of a hall elements is a low
level as below 50mVp-p, please connect the MODE4 to
GND at external. In this case, the output current will be
shape. If the output minimum level of a hall elements is
more higher than 50mVp-p, please make the MODE4 to
open, then the output current will be commutated softly.
We recommend that the output level of a hall element is
used for 80mVp-p to 120mVp-p and the MODE4 is made
to open.
SLEEP MODE FUNCTION
START / STOP
LOW or OPEN
HIGH
Motor Stop
Bias off
Hall-Bias off
Motor on
Bias on
Hall-Bias on
Figure 4.
Figure 4 shows the sleep mode function. If the 1pin
[S/S] is set to open or low, the current output will be
high impedance and then the motor will be stop. Also,
the IC bias current wil be a slight current (please make
reference the electrical characteristics). At the same
time, the hall bias output will be cut off. When the 1pin
goes high, the all of circuits will be available.
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet M56755FP.PDF ] | |
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